flavin

This term is used exclusively within biochemistry and molecular biology to describe a specific class of yellow pigments. It refers to molecules derived from riboflavin (vitamin B2) that facilitate electron transfer in redox reactions. Because it describes a specific chemical entity, it is used in a highly technical register and is rarely encountered outside of scientific literature or medical textbooks.

In a laboratory context, the term often appears in discussions regarding the electron transport chain or the function of flavoproteins. It is distinct from general dyes or pigments due to its specific biological role as a coenzyme or prosthetic group.